[2000SoCalBoxsterS]

I personally like the plastic window better than the glass because I feel I get better visibility out the back when the top is up with the larger plastic window. The down side is that the plastic window is not as durable as the glass. That said, for those of us with the plastic window here is my advice. Never leave the top down for extended periods of time. Whenever you are done driving top down put it back up. My Boxster is now 7 years old and my rear plastic window is in excellent condition by always storing it with the top up. I understand that if the car is your daily driver and you use a hardtop during the winter this is not practical. But it's a catch-22, if you don't use a hard top your top will probably show wear faster from winter use, if you do use a hard top the your top is down all winter and your plastic window gets ruined anyway. I'd leave it up in winter and keep it in the garage when not in use.